# Python {/* #python */}

首先阅读 [REST 指南](/docs/zh/api/rest)，创建平台 API 令牌。本示例使用 Python 标准库，无需生成客户端。

保存为 `example.py`：

```python
import json
import os
from urllib.parse import quote, urlencode
from urllib.request import Request, urlopen

base_url = os.getenv("CR_RECONSTRUCT_REST_URL", "https://reconstruct.dev/api/v1/platform")
token = os.environ["CR_RECONSTRUCT_API_TOKEN"]


def get_json(path):
    request = Request(
        f"{base_url.rstrip('/')}{path}",
        headers={"Authorization": f"Bearer {token}"},
    )
    with urlopen(request, timeout=10) as response:
        return json.load(response)


page = get_json("/catalogs?" + urlencode({"pageSize": 10}))
for catalog in page.get("catalogs", []):
    detail = get_json("/catalogs/" + quote(catalog["catalogId"], safe=""))
    print(detail["catalogId"], detail.get("description", ""))

if page.get("nextPageToken"):
    print("Next page token:", page["nextPageToken"])
```

运行 `python example.py`。将 `nextPageToken` 作为 `pageToken` 查询参数传回，以继续遍历列表。